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Collard Greens

Brassica oleracea var. viridis

vegetable

Collard greens are a nutrient-dense leafy vegetable related to cabbage, featuring large, smooth, blue-green leaves that grow on a thick central stem. They thrive in cool-season gardens and become sweeter after a frost, making them ideal for fall and winter harvests. This hardy crop tolerates poor soil better than many brassicas and can produce leaves continuously when harvested properly.

Collard Greens

Common Problems

Select the problem your Collard Greens is experiencing to get a treatment guide.

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Yellow Leaveschevron_right
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Holes In Leaveschevron_right
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Slow Growthchevron_right
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Boltingchevron_right
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Wiltingchevron_right

Care Guide

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Light
Full sun (6–8 hours daily); tolerates partial shade in hot climates.
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Water
Keep soil consistently moist but not waterlogged; provide 1–1.5 inches per week via rain or irrigation.
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Soil
Well-draining, fertile loam with pH 6.0–7.5; amend with compost or aged manure before planting.
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Fertiliser
Apply balanced fertilizer (10–10–10) at planting and again 3–4 weeks later; side-dress with nitrogen if leaves pale.
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Temperature
Prefers 45–75°F; cold-hardy and improves in flavor after light frost; bolts in prolonged heat above 80°F.
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Humidity
Moderate humidity (40–60%); water at soil level to prevent fungal issues on foliage.

Toxicity

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Entirely safe for all household members; no toxic compounds present.

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Collard Greens Care Guide — Brassica oleracea var. viridis | GreenScout